Finding the Third Proportional to 3,645,567 and 8,439,633

Step by Step Solution

1. Step 1: Write the proportion equation
   3,645,567 : 8,439,633 = 8,439,633 : x
2. Step 2: Convert to fraction form
   3,645,567/8,439,633 = 8,439,633/x
3. Step 3: Cross multiply
   3,645,567x = 8,439,633 × 8,439,633
4. Step 4: Simplify right side
   3,645,567x = 71,227,405,174,689
5. Step 5: Solve for x
   x = 71,227,405,174,689/3,645,567
6. Step 6: Final answer
   x = 19,538,086.99